\section{Validity of the Interviews}
\label{sec:interviewevaluation}

Many of the persons that we interviewed (Søren Møller Jensen, Ville Meloni, Henrik Korsgaard, and Lasse Steenbock Vestergaard) either work for research institutions or non-profit organisations and therefore we estimate a high validity of their statements due to apparently unbiased interests. Their primary driver is to communicate and widen their knowledge about their field of research. None of these interviewees were concerned about how we quoted them and demanded to validate any quotations.

\noindent Adrian Ulisse is working for a private organisation/consortium but the core of his work is based on holistic thinking and cross-sector research and we also estimate his statement to have a high degree of validity. We should be a little more careful with Kristoffer Hvidsteen because he represents a big player in the private sector and can therefore be biased towards his own interests. The same goes for Søren Kvist who is deeply involved in a concrete smart city project which is funded by the municipality of Copenhagen and he inherently serves the interests of the public sector (at least in the current stage of Copenhagen Connecting). Therefore he is also more biased than then four before mentioned interviewees.

All in all we do not think that any of the interviewees have interests in hiding crucial information to our research. \bigskip

\noindent During all the interviews we used to interview guide (Appendix \ref{app:interviewguides}) as a reference point for the discussion. But as one can see from the transcriptions, we asked many additional questions that we found relevant and we made full use of the semi-structured interview. \bigskip

\noindent All the interviews were done using Skype except the interview with Søren Kvist which was a face-to-face interview in the new buildings of Copenhagen Solutions Lab.